Fact.
Once the IRS files a Notice of Federal Tax Lien they can legally claim any property you own and any property you get after it is filled.
Fact.
It will eventually show up on your credit report preventing you from opening any new lines of credit.
Fact.
That a Notice of Levy gives the IRS legal right to take your wages, bank accounts, social security benefits, and any other income you have.
Fact.
Once it has been filled the IRS cannot remove it until the debt has been paid.
Fact.
A Notice of Federal Tax Lien will stay on your credit file for 7-years.
Fact.
That a Notice of Levy also allows the IRS to sell your property to pay off your debt.